WO2007099900A1 - Dispositif de station de base de reseau adaptatif et son procede de commande - Google Patents

Dispositif de station de base de reseau adaptatif et son procede de commande Download PDF

Info

Publication number
WO2007099900A1
WO2007099900A1 PCT/JP2007/053497 JP2007053497W WO2007099900A1 WO 2007099900 A1 WO2007099900 A1 WO 2007099900A1 JP 2007053497 W JP2007053497 W JP 2007053497W WO 2007099900 A1 WO2007099900 A1 WO 2007099900A1
Authority
WO
WIPO (PCT)
Prior art keywords
array antenna
transmission
antenna
reception
array
Prior art date
Application number
PCT/JP2007/053497
Other languages
English (en)
Japanese (ja)
Inventor
Masato Fujishiro
Original Assignee
Kyocera Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2006051290A external-priority patent/JP4436333B2/ja
Priority claimed from JP2006051289A external-priority patent/JP4436332B2/ja
Application filed by Kyocera Corporation filed Critical Kyocera Corporation
Priority to CN200780006784.7A priority Critical patent/CN101390305B/zh
Priority to US12/280,670 priority patent/US8150469B2/en
Publication of WO2007099900A1 publication Critical patent/WO2007099900A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/2605—Array of radiating elements provided with a feedback control over the element weights, e.g. adaptive arrays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/246—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for base stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0691—Hybrid systems, i.e. switching and simultaneous transmission using subgroups of transmit antennas

Definitions

  • the present invention relates to an adaptive array base station apparatus and a control method therefor, in particular, a transmission / reception apparatus including at least one antenna element and transmission / reception control means for controlling transmission / reception of a radio signal by the antenna element.
  • a transmission / reception apparatus including at least one antenna element and transmission / reception control means for controlling transmission / reception of a radio signal by the antenna element.
  • Two or more adaptive array base station apparatuses and control methods thereof, and adaptive array base station apparatuses that perform radio communication with each of a plurality of mobile station apparatuses selectively using at least three antenna elements, and control methods thereof Regarding.
  • An adaptive array antenna (Adaptive Array Antenna) is composed of a plurality of antenna elements. By controlling the directivity according to the radio wave propagation environment, the desired wave can be captured and the interference wave can be detected. It is an antenna that can be suppressed. It is characterized in that the main beam is directed in a desired direction by beamforming, and a null point of a directivity pattern is formed in the interference direction by null steering.
  • an adaptive array antenna has better transmission / reception characteristics as the correlation between transmission / reception signals at each antenna element constituting the array is smaller.
  • one adaptive array antenna is configured by combining two or more antenna elements that are sufficiently far apart.
  • the correlation changes due to various causes other than the spatial distance between the antenna elements. For example, deviations in the antenna position due to installation errors, manufacturing variations in antenna elements and transmission / reception devices including them, and aging degradation can be a major factor in changing the correlation between antenna elements or between transmission / reception devices. Also, the correlation may change due to leakage of radio waves due to the shield gap force that occurs when the manufacturing accuracy of the high-frequency shield of the transceiver is poor. In addition, the correlation changes with changes in the surrounding radio wave environment Can be When adaptive array transmission / reception is performed by combining antenna elements or transmission / reception apparatuses that have a poor correlation due to a strong cause, the adaptive array performance, that is, the beam directing performance, is significantly reduced.
  • Patent Document 1 listed below describes a phase relationship between antenna elements based on a received signal of each antenna element in a radio wave transmitting / receiving apparatus that includes a plurality of antenna elements having different polarization directions that are spatially separated.
  • Patent Document 2 in an adaptive array radio apparatus having a group power of three or more antenna elements, each of the signal powers received by the adaptive array by two selected antenna elements is described. Improve adaptive array reception performance while minimizing the addition of antenna elements and transceivers by estimating the antenna correlation value and determining the combination of two antenna elements that minimizes the antenna correlation value Technology to achieve this is disclosed.
  • Patent Document 1 Japanese Unexamined Patent Application Publication No. 2004-312381
  • Patent Document 2 Japanese Patent Laid-Open No. 2004-289407
  • Patent Document 1 and Patent Document 2 each receive a radio signal transmitted from another transmitting apparatus, and calculate a correlation between antenna elements based on the received signal. It is. According to the technique, it is possible to determine the combination of antenna elements that minimize the reception correlation, and to improve the reception performance.
  • the above technique has a problem that it must be premised on the existence of another device that transmits a radio signal.
  • a difference in communication performance due to each of a plurality of combinations of antenna elements is not taken into consideration, it is not possible to select a combination of antenna elements having appropriate communication performance according to the communication situation.
  • the present invention has been made in view of the above-described conventional problems, and a first object of the present invention is to independently provide an optimal antenna element and a transmission / reception including the antenna element without assuming the presence of another device.
  • An object of the present invention is to provide an adaptive array base station apparatus capable of determining a combination of apparatuses and improving adaptive array performance and a control method thereof.
  • the second object is to adapt the entire base station apparatus by switching the antenna element used for each communication or the combination of transmission / reception apparatuses including the antenna element according to the state of communication with each mobile station apparatus. It is an object of the present invention to provide an adaptive array base station apparatus capable of improving the active array performance and a control method thereof.
  • an adaptive array base station apparatus includes a transmission / reception including at least one antenna element and a transmission / reception control unit for controlling transmission / reception of a radio signal by the antenna element.
  • An adaptive array base station device comprising three or more devices, wherein at least two of the transmission / reception devices are selected, and array antenna configuration means for sequentially configuring one array antenna by combining the selected transmission / reception devices; Each time the array antenna configuring means configures the array antenna, a part or all of the antenna elements other than the at least two transmitting / receiving devices configuring the array antenna are included in the array antenna.
  • a part or all of the array antenna transmission control means for transmitting a radio signal having a predetermined directivity pattern and the transmission from each array antenna sequentially constituted by the array antenna constituting means.
  • An array antenna that measures a reception level of a radio signal received by each reception antenna element and calculates an array antenna communication performance value indicating the communication performance of each array antenna based on the reception level.
  • the array antenna communication performance values satisfy the predetermined performance condition.
  • the adaptive array base station apparatus control method includes at least one antenna element and three or more transmission / reception apparatuses including transmission / reception control means for controlling transmission / reception of radio signals by the antenna element.
  • An array base station apparatus control method comprising: an array antenna configuration step of selecting at least two of the transmission / reception apparatuses, and sequentially configuring one array antenna by combining the selected transmission / reception apparatuses; Each time the array antenna is configured in the configuration step, the antenna element is included in a part or all of each of the transmission / reception devices excluding the at least two transmission / reception devices constituting the array antenna from the array antenna.
  • a radio signal having a predetermined directivity pattern is transmitted to each receiving antenna element.
  • An array antenna communication performance measurement step for measuring an array antenna communication performance value indicating the communication performance of each array antenna based on each reception level! And the array antenna communication performance measurement Based on some or all of the array antenna communication performance values generated in the step! /, An array antenna whose array antenna communication performance value satisfies a predetermined performance condition is selected, and the array antenna is configured.
  • An array antenna determining step for determining a combination of the at least two transmitting / receiving devices. It is characterized by In the present invention, one array antenna is sequentially configured by combining at least two transmitting / receiving apparatuses.
  • the antenna elements included in some or all of the transmission / reception devices, excluding at least two transmission / reception devices constituting the array antenna, from the array antenna.
  • a radio signal having a predetermined directivity pattern is transmitted.
  • the reception level of the radio signal received by a part or all of each reception antenna element is measured.
  • an array antenna communication performance value indicating the communication performance of each array antenna is calculated.
  • the array antenna communication performance value selects an array antenna satisfying a predetermined performance condition, and at least two transmission / reception devices constituting the array antenna are selected. Determine the combination of.
  • it is possible to improve the adaptive array performance by independently determining the optimal combination of the antenna element and the transmitting / receiving device including the antenna element without assuming the presence of another device.
  • the array antenna communication performance measurement unit is configured to transmit radio waves from the array antenna by the array antenna transmission control unit from the at least two transmission / reception devices constituting the array antenna.
  • Individual transmission control means for sequentially transmitting a radio signal having the same transmission power as each transmission power in signal transmission, and a part or all of each according to transmission from each of the at least two transmission / reception devices
  • Reference reception level measuring means for measuring a reception level of a radio signal received by each of the reception antenna elements and calculating a reference reception level that is a total value of at least two reception levels. Further, each array antenna communication performance value is calculated based on the level. By doing this, it becomes possible to determine the combination of transmission / reception devices constituting the array antenna based on the gain of the reception level obtained by performing the array antenna transmission.
  • the predetermined directivity pattern has directivity in a direction of at least one of the reception antenna elements, and the predetermined performance The condition is that the array antenna communication performance value in at least one of the reception antenna elements is equal to or greater than a predetermined value.
  • the predetermined directivity pattern further includes a directivity null point in a direction of at least some other receiving antenna elements other than the one receiving antenna element.
  • the predetermined performance condition is further conditional on an array antenna communication performance value of each of the other at least some of the receiving antenna elements being less than a predetermined value. This makes it possible to determine the combination of transmission / reception devices that constitute the array antenna based on the beamforming performance and null steering performance of the array antenna.
  • the adaptive array base station device selectively uses at least three antenna elements and wirelessly communicates with each of a plurality of mobile station devices.
  • An adaptive array base station apparatus that performs communication, selecting at least two antenna elements and combining the selected antenna elements to sequentially configure one array antenna, and the array
  • Array antenna communication performance measuring means and a part or all of each array antenna communication generated by the array antenna communication performance measuring means
  • An array antenna switching means for selecting an array antenna whose array antenna communication performance value satisfies a predetermined performance condition based on the performance value and using the array antenna for communication with at least one of the mobile station devices. It is characterized by that.
  • the control method for a base station apparatus is a control method for an adaptive array base station apparatus that performs radio communication with each of a plurality of mobile station apparatuses by selectively using at least three antenna elements.
  • An array antenna configuration step of selecting at least two antenna elements and sequentially configuring one array antenna by combining the selected antenna elements; and the array antenna configuration step Each time is configured, the communication performance of the array antenna is measured, and an array antenna communication performance value indicating the communication performance of each array antenna is calculated based on each measurement result.
  • the array antenna communication performance value is determined based on a part or all of the array antenna communication performance values generated by the ray antenna communication performance measurement step and the array antenna communication performance measurement step.
  • An array antenna switching step of selecting an array antenna that satisfies a condition and using the array antenna for communication with at least one of the mobile station apparatuses.
  • one array antenna is sequentially formed by combining at least two antenna elements. Each time an array antenna is configured, the communication performance of the array antenna is measured, and based on each measurement result, an array antenna communication performance value indicating the communication performance of each array antenna is calculated. Then, based on some or all of the array antenna communication performance values, an array antenna whose array antenna communication performance value satisfies a predetermined performance condition is selected, and the array antenna is connected to at least one mobile station apparatus. Used for communication. According to the present invention, it is possible to switch the combination of antenna elements used for communication with each mobile station apparatus based on the array antenna communication performance value, thereby improving the adaptive array performance of the entire base station apparatus. Can do.
  • the predetermined performance condition is determined based on information indicating a communication state in communication with each mobile station device. In this way, it becomes possible to switch the combination of antenna elements used for each communication according to the communication state with each mobile station apparatus, and the adaptive array performance of the entire base station apparatus can be improved. become.
  • the communication state in communication with each mobile station device is communication quality in each communication.
  • the combination of antenna elements used for each communication can be switched according to the communication quality in communication with each mobile station apparatus, and the adaptive array performance of the entire base station apparatus can be improved. become able to.
  • the communication state in communication with each mobile station device is the number of mobile station devices communicating with the adaptive array base station device. In this way, it is possible to switch the combination of antenna elements used for communication with each mobile station device according to the number of mobile station devices communicating with the base station device.
  • the adaptive array performance of the body can be improved.
  • the array antenna configuration unit includes at least three transmission / reception devices including the at least one antenna element and a transmission / reception control unit that controls transmission / reception of a radio signal by the antenna element. Selects at least two of the transmission / reception devices, and sequentially configures one array antenna by combining the selected transmission / reception devices. In this way, based on the array antenna communication performance value, it becomes possible to switch the combination of transmission / reception devices used for communication with each mobile station device, so that the adaptive array performance of the entire base station device can be improved. become.
  • Array antenna transmission control means for transmitting a radio signal having a predetermined directivity pattern to each receiving antenna element that is an antenna element included in each transmitting / receiving apparatus, and measuring the array antenna communication performance
  • the means measures the reception level of the radio signal received at each or all of the receiving antenna elements in response to transmission from the array antennas sequentially configured by the array antenna configuring means, and
  • the array antenna communication performance value is calculated based on the reception level. In this way, the array antenna communication performance value can be acquired autonomously without assuming the existence of other devices.
  • the array antenna communication performance measuring unit is configured to wirelessly transmit from the array antenna by the array antenna transmission control unit from the at least two transmission / reception devices constituting the array antenna.
  • Individual transmission control means for sequentially transmitting a radio signal having the same transmission power as each transmission power in signal transmission, and a part or all of each according to transmission from each of the at least two transmission / reception devices
  • Reference reception level measuring means for measuring a reception level of a radio signal received by each of the reception antenna elements and calculating a reference reception level that is a total value of at least two reception levels. Further, each array antenna communication performance value is calculated based on the level. This way, the presence of other devices The array antenna communication performance value can be obtained based on the gain of the reception level obtained by performing the array antenna transmission without assuming it.
  • the predetermined directivity pattern has directivity in the direction of at least one of the reception antenna elements, and the predetermined performance The condition is that the array antenna communication performance value in at least one of the reception antenna elements is equal to or greater than a predetermined value. In this way, based on the beamforming performance of the array antenna, it is possible to switch the combination of transmission / reception devices used for communication with each mobile station device, thereby improving the adaptive array performance of the entire base station device. Will be able to.
  • the predetermined directivity pattern further includes a directivity null point in a direction of at least some other receive antenna elements other than the one receive antenna element.
  • the predetermined performance condition is further conditional on an array antenna communication performance value of each of the other at least some of the receiving antenna elements being less than a predetermined value. In this way, based on the beam forming performance and null steering performance of the array antenna, it is possible to switch the combination of the transmitting and receiving devices used for communication with each mobile station device, and the adaptive array of the entire base station device. The performance can be improved.
  • FIG. 1 is a system configuration diagram of a mobile communication system and a base station apparatus according to an embodiment of the present invention.
  • FIG. 2 is a functional block diagram of a base station apparatus according to an embodiment of the present invention.
  • FIG. 3 is a diagram for explaining how to measure the communication performance of an array antenna autonomously.
  • FIG. 4 is a diagram showing an example of a reception level measurement result in measurement of communication performance of an array antenna.
  • FIG. 5 is a diagram for explaining how to independently measure the communication performance of each transmitting / receiving device.
  • FIG. 6 is a diagram showing an example of a reception level measurement result and a reference reception level calculation result in communication performance measurement of each transceiver.
  • FIG. 7 is a diagram showing an example of a calculation result of an array antenna communication performance value.
  • FIG. 8 is a diagram showing an example of a calculation result of isolation between transmission / reception devices.
  • FIG. 9 is a diagram showing an example of a calculation result of an array antenna communication performance value.
  • FIG. 10 is a flowchart for explaining processing during operation of the base station apparatus.
  • FIG. 11 is a flowchart illustrating self-diagnosis processing.
  • FIG. 12 is a flowchart illustrating reception level measurement processing for each transmission / reception device.
  • FIG. 13 is a flowchart illustrating reception level measurement processing for each transmission / reception device group.
  • FIG. 1 (a) is a diagram showing an overall configuration of mobile communication system 150 according to the embodiment of the present invention.
  • mobile communication system 150 includes base station apparatus 100 connected to communication network 120 via a wired transmission path, and a plurality of mobile station apparatuses 120 connected to base station apparatus 100 via a wireless transmission path. Consists of including.
  • FIG. 1 (b) is a diagram showing the configuration of base station apparatus 100.
  • base station apparatus 100 is configured to include antenna element 42 and three or more transceivers 44 that are connected to antenna element 42 and control transmission / reception of radio signals by antenna element 42. .
  • base station apparatus 100 includes four antenna elements 42 and four transmitters / receivers 44 will be described as an example.
  • FIG. 2 is a functional block diagram of base station apparatus 100.
  • the base station device 12 includes a main control unit 10, a transmission / reception device control unit 20, a storage unit 30, and three or more transmission / reception devices 40.
  • an array antenna is configured by combining at least two transmission / reception devices 40, At the same time, it has a self-diagnosis function of the transmitting / receiving device 40 for measuring the communication performance of the array antenna by receiving a radio signal transmitted from the array antenna camera by another transmitting / receiving device 40 that does not constitute the array antenna. Characterized by dots. And by utilizing this self-diagnosis function, it is possible to determine the combination of transmitting and receiving devices 40 that constitute an array antenna with excellent communication performance autonomously without assuming the presence of other devices. Yes.
  • each component of base station apparatus 100 will be described in detail.
  • the main control unit 10 is configured with a CPU and a memory and the like, and controls the base station device 100 as a whole.
  • the storage unit 30 is configured by, for example, a memory of the main control unit 10 and operates as a work memory of the main control unit 10 and the transmission / reception device control unit 20.
  • the transmission / reception device 40 includes at least one antenna element 42 and a transmission / reception device 44.
  • the transmission / reception device 40 receives a transmission signal of equal power from the mobile station device via the antenna element 42 and demodulates the reception signal. Audio signals and communication packets to be output to the main control unit 10. Further, in accordance with an instruction from the main control unit 10, an audio signal or a communication bucket input from the main control unit 10 is modulated into a transmission signal and transmitted through the antenna element 42.
  • the transmission / reception device control unit 20 is connected to each transmission / reception device 40 and includes an array antenna configuration control unit 21, an array antenna transmission / reception control unit 25, and an array antenna communication performance measurement unit 26. Then, each transmitter / receiver 40 is instructed to transmit / receive radio signals independently, or at least two transmitter / receivers 40 are combined to form an array antenna, and each transmitter / receiver 40 is operated in a coordinated manner. Send and receive radio signals using the array antenna.
  • the array antenna configuration control unit 21 includes an array antenna configuration unit 22, an array antenna determination unit 23, and an array antenna switching unit 24.
  • the array antenna configuration control unit 21 is configured to configure an array antenna by combining at least two transmission / reception devices 40. Process.
  • the array antenna configuration unit 22 selects at least two transmission / reception devices 40 and combines the selected transmission / reception devices 40 to configure one array antenna.
  • the array antenna transmission / reception control unit 25 performs a part or all of the transmission / reception from the array antenna excluding at least two transmission / reception devices that configure the array antenna.
  • a radio signal having a predetermined directivity pattern is transmitted to a device 40, that is, an antenna element 42 (hereinafter referred to as a receiving antenna element) included in a part or all of the transmitting and receiving devices 40 that does not constitute the array antenna.
  • a directivity pattern is a spatial range in which radio signals can be transmitted and received by an antenna.
  • the beamforming performance of the array antenna can be improved. It can be measured. In addition, direct to the direction of at least some other receiving antenna elements. If the antenna has an additional null point, the null steering performance of the array antenna can be measured.
  • FIG. 3 is a diagram for explaining a state in which the communication performance of an array antenna formed by combining two transmission / reception devices 40 is independently measured.
  • the array antenna transmission / reception control unit 25 sends a main beam from the array antenna formed by combining the transmission / reception devices TRX1 and TRX2 configured by the array antenna configuration unit 22 to the transmission / reception device TRX3 by beam forming.
  • it shows a state in which a null signal is transmitted in the direction of the transmitter / receiver TRX4 by null steering.
  • the beamforming performance of the array antenna composed of TRX1 and TRX2 can be independently measured based on the reception level in TRX3. Also based on the reception level in TRX4!
  • the null steering performance of the array antenna consisting of TRX1 and TRX2 can be measured independently. Furthermore, if the adaptive array configuration unit 22 sequentially changes the combination of the transmission / reception devices 40 and configures an array antenna for every combination of the transmission / reception devices 40, the base station device 100 can In addition, it is possible to measure the communication performance of an adaptive array for all array antennas that can be configured.
  • FIG. 4 shows an example of the reception level measurement result in the measurement of the communication performance of the array antenna formed by combining two arbitrary transmission / reception devices 40. The figure shows the measurement results when two receiving / transmitting devices 40 on the receiving side are subjected to beam forming with a smaller TRX number and null steering with a larger TRX number. The measurement results in the figure are for the case where the transmission level of each TRX is 30. OdBm.
  • the array antenna communication performance measurement unit 26 includes an individual transmission / reception control unit 27 and a reference reception level measurement unit 28, and responds to the transmission of each array antenna force sequentially configured by the array antenna configuration unit 22. Then, measure the reception level of the radio signal received at some or all of the receiving antenna elements. Also, based on each reception level, an array antenna communication performance value indicating the communication performance of each corresponding array antenna is calculated.
  • each reception level corresponding to transmission of each array antenna power may be used. In the example shown in FIG. 3, the higher the reception level in TRX3 directed to the main beam, the higher the arrayer composed of TRX1 and TRX2.
  • the array antenna communication performance value is not determined based on only the reception level corresponding to the transmission of each array antenna force, but from the individual transmission / reception control unit 27 and the reference reception level measurement unit 28. It may be determined based on the obtained reference reception level. That is, the individual transmission control unit 27 transmits the same transmission power as the transmission power in the radio signal transmission of each array antenna power by the array antenna transmission / reception control unit 25 from at least two transmission / reception devices 40 constituting each array antenna. Transmits the wireless signals it has sequentially. Further, the reference reception level measuring unit 28 measures the reception levels of the radio signals respectively received by some or all of the reception antenna elements in response to transmissions from the at least two transmission / reception devices, and at least 2 of them. The total value of the two reception levels is obtained as the reference reception level.
  • FIG. 5 is a diagram for explaining a state in which the communication performance of each transmission / reception device 40 alone is measured autonomously.
  • the figure shows how the individual transmission / reception control unit 27 transmits a radio signal having the same transmission power as the transmission power in the radio signal transmission by the array antenna transmission / reception control unit 25 from TRX1. .
  • Fig. 6 (a) shows an example of the reception level measurement result in the communication performance measurement of each transceiver 40 itself.
  • FIG. 6 (b) shows the reference reception level of the array antenna in which the reference reception level measurement unit 28 is based on the measurement result shown in FIG. 6 (a)! The calculation results are shown.
  • the reference reception level of TRX3 corresponding to transmission is the reception level of TRX3 corresponding to transmission from TRX1 alone. 25.
  • the reception level of TRX3 corresponding to transmission from TRX2 alone. Is 18. OdBm.
  • array antenna transmission is performed using N antennas for a certain receiving antenna and all phases are matched at the receiving antenna end, array antenna transmission is not performed. It is known that N times the received power can be obtained.
  • the reference reception level obtained by the reference reception level measurement unit 28 corresponds to the reception power when the array antenna transmission is not performed, and can therefore be used as a reference reception level when measuring the gain by transmitting the array antenna. That is, the larger the reception level related to the array antenna transmission is, the higher the beam reception performance of the array antenna is, compared to the reference reception level related to the array antenna, and the lower the value is, the lower the reference reception level is. It shows that the null steering performance is high.
  • FIG. 7 shows the array antenna communication performance value obtained based on the reception level measurement result shown in FIG. 4 and the reference reception level calculation result shown in FIG. 6 (b) based on the above concept.
  • the difference (reception power ratio) between the reception level shown in Fig. 4 and the reference reception level shown in Fig. 6 (b) is used as the array antenna communication performance value.
  • array antenna communication performance value of TRX3 of array antenna combining TRX1 and TRX2 Beam forming '14' value
  • the array antenna communication performance value (null steering performance value) of TRX4 is 30. OdB minus 49.2 dBm power minus 19.2 dBm.
  • the figure shows that the combination of TRX1 and TRX2 and the combined force of TRX3 and TRX4 have good beamforming performance (array gain) and null steering performance (null depth).
  • FIG. 8 shows the calculation result of the isolation indicating the degree of separation (low transmission / reception correlation) between the transmission / reception devices 40.
  • the measurement results shown in FIG. 6 (a) are for the case where all the transmission levels of each TRX are set to 30 OdBm. Therefore, the isolation between the transmission / reception devices 40 is, for example, the reception with respect to the transmission level. It can be indicated by the size of the level.
  • the difference between the reception level and the transmission level ratio of reception power and transmission power
  • the isolation between TRX1 and TRX2 is TRX2 corresponding to transmission from TRX1.
  • the isolation obtained by the forceful method is used, for example, to determine whether or not the performance measurement by the array antenna communication performance measuring unit 26 can be performed normally (impossible to perform if the abnormal value is close to OdBm). Can do. Further, it can be used to perform control such as lowering the selection priority of combinations of transmission / reception devices 40 whose isolation shows an abnormal value or removing them from selection targets.
  • the array antenna determination unit 23 determines whether the array antenna communication performance value satisfies a predetermined performance condition based on a part or all of the array antenna communication performance values generated by the array antenna communication performance measurement unit 26. Select the array antenna. Then, the combination of at least two transmission / reception devices making up the selected array antenna is determined as a combination that exhibits excellent array antenna communication performance. Specifically, an array antenna whose array antenna communication performance value is at least a predetermined value in at least one of the receiving antenna elements targeted for beam forming may be selected. In this way, it becomes possible to determine the combination of transmitting and receiving devices that constitute an array antenna with excellent beamforming performance.
  • an array antenna whose array antenna communication performance value is less than a predetermined value in each of at least some other receiving antenna elements that are subjected to null steering may be selected.
  • the combination of transmitting and receiving devices that constitute an array antenna that has both excellent beamforming performance and null steering performance For example, if the array antenna communication performance value generated by the array antenna communication performance measurement unit 26 is the value shown in Fig. 7, the beamforming performance is 2.5 dB or more and the null steering performance is-32 If the condition of OdB or less is set as the condition for selecting the array antenna, only the combination of TRX3 and TRX4 satisfies both conditions. In this case, the array antenna determination unit 23 determines the combination of TRX3 and TRX4 as a combination that can exhibit excellent beamforming performance and null steering performance.
  • the array antenna switching unit 24 uses the array antenna communication performance value based on a part or all of the array antenna communication performance values generated by the array antenna communication performance measurement unit 26. Selects an array antenna that satisfies a predetermined performance condition.
  • the selected array antenna is used for communication with at least one mobile station apparatus 110.
  • the performance condition for selecting the array antenna can be determined based on the communication quality in communication with each mobile station apparatus 110.
  • the base station device 100 when the base station device 100 is communicating with a certain mobile station device 110, when the mobile station device 110 moves to a weak electric field area, the communication quality in the communication is significantly degraded. In such a case, it is desirable to use an array antenna with the best beamforming performance as much as possible in order to avoid disconnection of communication and activation of handover. In other words, it is desirable to place importance on beamforming performance based on communication quality as a performance condition for selecting an array antenna. If the array antenna communication performance value generated by the array antenna communication performance measurement unit 26 is the value shown in Figure 9, the combination of TRX1 and TRX2 and the combination of TRX3 and TRX4 have good beamforming performance and null steering performance.
  • the combination of TRX1 and TRX4 and the combination of TRX2 and TRX3 have particularly excellent beamforming performance, and can be said to be effective array antennas when beamforming is important.
  • the combination of TRX1 and TRX3 The combination of TRX2 and TRX4 is particularly excellent in null steering performance and can be said to be an effective array antenna when null steering is important.
  • either the combination of TRX1 and TRX4 or the combination of TRX2 and TRX3 is selected by the array antenna switching unit 24 and used for the communication. In this way, there is a high possibility that the disconnection of communication and the start of handover will be avoided.
  • the array antenna switching unit 24 communicates with the base station apparatus 100, and the array antenna is switched based on the number of mobile station apparatuses 110 or the traffic volume in the base station apparatus 100. You may make it determine the performance conditions for selecting. In this way, for example, in an area where traffic is low, the overall throughput of the base station apparatus 100 can be improved by preferentially using an array antenna having a standard array antenna communication performance value. .
  • FIG. 10 is a flowchart for explaining processing during operation in base station apparatus 100.
  • FIG. 11 is a flowchart for explaining the self-diagnosis process.
  • the individual transmission / reception control unit 27 and the reference reception level measurement unit 28 measure the reception level for each transmission / reception device 40 and store the measurement result in the storage unit 30 (S220).
  • FIG. 12 is a flowchart detailing the process in S220.
  • the individual transmission / reception control unit 27 sets TRX1 to the transmission state and TRX2 to 4 to the reception state (S230), and measures the reception level at TRX2 to 4 according to the transmission from TRX1.
  • the measurement result is stored in the storage unit 30 (S232).
  • TRX2, TRX3, and TRX4 are sequentially set to the transmission state, and the reception levels are measured and stored in the storage unit 30 (S234 to S244).
  • the process proceeds to S222.
  • the isolation between the transmission / reception devices 40 is calculated, and the calculation result is stored in the storage unit 30.
  • the reference reception level measurement unit 28 calculates a reference reception level for each set of transmitting and receiving devices constituting the array antenna based on the measured reception level, and stores the calculation result in the storage unit 30 (S224).
  • the array antenna transmission / reception control unit 25 and the array antenna communication performance measurement unit 28 measure the reception level for each array antenna sequentially configured by the array antenna configuration unit 22, and store the measurement result in the storage unit 30. (S226).
  • FIG. 13 is a flowchart detailing the processing in S226.
  • the array antenna configuration unit 22 forms an array antenna by combining TRX1 and TRX2, and the array antenna transmission / reception control unit 25 and the array antenna communication performance measurement unit 2 7 combine an array antenna consisting of TRX1 and TRX2.
  • the reception level is measured by TRX3 and TRX4, and the measurement result is stored in the storage unit 30 (S252).
  • each array antenna formed by combining two transmitting / receiving apparatuses is sequentially set to the transmission state, and the reception level is measured and stored in the storage unit 30 (S254 to S262).
  • the process moves to S228.
  • the array antenna communication performance measurement unit 27 calculates the array antenna performance measurement value based on the reception level and the reference reception level calculated in S224 for each array antenna force measured in S226. The result is stored in the storage unit 30 (S228). When communication performance values are obtained for all array antennas, the process proceeds to S210 in FIG.
  • the self-diagnosis process does not end normally in S208 (S210), the self-diagnosis is executed again (S208). If the self-diagnosis process ends normally (S210), the array antenna determination unit 23, based on each array antenna performance measurement value stored in the storage unit 30, the array antenna having a predetermined array antenna communication performance value. Is selected, and the combination of the two transmission / reception devices constituting the array antenna is determined (S212). If the process in S212 does not end normally (S214), it is executed again (S212), and if it ends normally, it returns to normal operation again (S200).
  • the optimum antenna element autonomously and a transmission / reception apparatus including the antenna element are independently assumed without the presence of another apparatus. Can be determined to improve adaptive array performance.
  • the present invention is not limited to the above-described embodiment.
  • the array antenna is configured by combining not only two forces but also three or more transmitting / receiving devices in the example in which the array antenna is configured by combining two transmitting / receiving devices.
  • the communication performance may be measured.
  • the base station apparatus has a configuration in which the relationship between transmission and reception is reversed between the transmission / reception apparatus constituting the array antenna and the transmission / reception apparatus not constituting the array antenna. You may make it take. In this way, it is possible to perform performance measurement by adaptive array reception rather than performance measurement by adaptive array transmission.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Transmission System (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne une section de constitution d'antennes réseau(22) qui constitue une par une, une antenne réseau en combinant au moins deux récepteurs/émetteurs (40). À chaque fois qu'une antenne réseau est constituée, une section de réception/émission d'antenne réseau (25) émet un signal radio doté de schéma de directivité prédéfini à toute ou à une partie des éléments d'antenne (42) ne faisant pas partie des antennes réseau constituées. En réponse à l'émission de chaque antenne réseau, une section de mesure de la performance de la communication d'antenne réseau (26) mesure le niveau de réception de chacune des éléments complets ou partiels d'antenne (42) et calcule la valeur de performance de communication d'antenne réseau de chaque antenne réseau à partir du niveau de réception mesuré. Une section de détermination d'antenne réseau (23) détermine une combinaison d'au moins deux émetteurs/récepteurs (40) constituant les antennes réseau ayant une condition de performance prédéfinie selon la valeur de performance de communication d'antenne réseau.
PCT/JP2007/053497 2006-02-27 2007-02-26 Dispositif de station de base de reseau adaptatif et son procede de commande WO2007099900A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN200780006784.7A CN101390305B (zh) 2006-02-27 2007-02-26 自适应阵列基站装置和自适应阵列基站装置的控制方法
US12/280,670 US8150469B2 (en) 2006-02-27 2007-02-26 Adaptive array base station device and adaptive array base station device control method

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2006051290A JP4436333B2 (ja) 2006-02-27 2006-02-27 アダプティブアレイ基地局装置及びアダプティブアレイ基地局装置の制御方法
JP2006051289A JP4436332B2 (ja) 2006-02-27 2006-02-27 アダプティブアレイ基地局装置及びアダプティブアレイ基地局装置の制御方法
JP2006-051290 2006-02-27
JP2006-051289 2006-02-27

Publications (1)

Publication Number Publication Date
WO2007099900A1 true WO2007099900A1 (fr) 2007-09-07

Family

ID=38459007

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/053497 WO2007099900A1 (fr) 2006-02-27 2007-02-26 Dispositif de station de base de reseau adaptatif et son procede de commande

Country Status (2)

Country Link
US (1) US8150469B2 (fr)
WO (1) WO2007099900A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8918062B2 (en) 2009-12-08 2014-12-23 Qualcomm Incorporated Combined intelligent receive diversity (IRD) and mobile transmit diversity (MTD) with independent antenna switching for uplink and downlink
US20110249576A1 (en) * 2009-12-21 2011-10-13 Qualcomm Incorporated Antenna selection based on performance metrics in a wireless device
US20110249760A1 (en) * 2009-12-21 2011-10-13 Qualcomm Incorporated Antenna selection based on measurements in a wireless device
US20110250926A1 (en) * 2009-12-21 2011-10-13 Qualcomm Incorporated Dynamic antenna selection in a wireless device
WO2014205751A1 (fr) * 2013-06-28 2014-12-31 华为技术有限公司 Procédé de commande de station de base multimode et station de base
US12058735B2 (en) * 2021-01-29 2024-08-06 Qualcomm Incorporated Transmit receive point directional transmission for channel sensing

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63269626A (ja) * 1987-04-28 1988-11-07 Mazda Motor Corp 自動車電話の故障検出装置
JP2004289407A (ja) * 2003-03-20 2004-10-14 Sanyo Electric Co Ltd アダプティブアレイ無線装置、アンテナ選択方法およびアンテナ選択プログラム

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6748216B1 (en) * 1991-04-02 2004-06-08 Cellco Partnership Method and apparatus for intelligent microcell and antenna selection in digital cellular telephone systems
WO2000003456A1 (fr) * 1998-07-13 2000-01-20 Ntt Mobile Communications Network, Inc. Antenne adaptative en reseau
JP3877678B2 (ja) * 2000-07-14 2007-02-07 三洋電機株式会社 キャリブレーション装置、アダプティブアレー装置、キャリブレーション方法、プログラム記録媒体及びプログラム
US6486828B1 (en) * 2000-07-26 2002-11-26 Western Multiplex Adaptive array antenna nulling
JP3601598B2 (ja) * 2001-05-11 2004-12-15 日本電気株式会社 適応アンテナ受信装置
US7039356B2 (en) * 2002-03-12 2006-05-02 Blue7 Communications Selecting a set of antennas for use in a wireless communication system
JP3742779B2 (ja) * 2002-03-22 2006-02-08 松下電器産業株式会社 基地局装置およびセクタ制御方法
US6754475B1 (en) * 2002-06-28 2004-06-22 Motorola, Inc. Transmission performance measurement and use thereof
JP4184854B2 (ja) 2003-04-07 2008-11-19 株式会社エヌ・ティ・ティ・ドコモ 電波送受信装置及び電波送受信方法
US7643794B2 (en) * 2003-04-07 2010-01-05 Yoram Ofek Multi-sector antenna apparatus
KR100876797B1 (ko) * 2004-07-13 2009-01-07 삼성전자주식회사 다중 안테나 시스템에서의 빔포밍 장치 및 방법

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63269626A (ja) * 1987-04-28 1988-11-07 Mazda Motor Corp 自動車電話の故障検出装置
JP2004289407A (ja) * 2003-03-20 2004-10-14 Sanyo Electric Co Ltd アダプティブアレイ無線装置、アンテナ選択方法およびアンテナ選択プログラム

Also Published As

Publication number Publication date
US8150469B2 (en) 2012-04-03
US20090015475A1 (en) 2009-01-15

Similar Documents

Publication Publication Date Title
CN112383321B (zh) 射频系统、天线切换控制方法和客户前置设备
EP2882110B1 (fr) Dispositif et procédé de communication utilisant une formation de faisceau dans un système de communication sans fil
US9065496B2 (en) Method and system for switched combined diversity with a modal antenna
US9590703B2 (en) Modal cognitive diversity for mobile communication systems
US9425497B2 (en) State prediction process and methodology
JP4425927B2 (ja) 切替型ビームアンテナシステムにおける、ビーム切替の過渡的な影響を低減するための方法および装置
US9781713B2 (en) Method and radio network node for enabling switch of transmission mode for a User Equipment
EP3469730B1 (fr) Sélection de faisceau pour un dispositif émetteur-récepteur radio
WO2007099900A1 (fr) Dispositif de station de base de reseau adaptatif et son procede de commande
US20210176771A1 (en) Adaptive Antenna for Channel Selection Management in Communications Systems
CN107439044B (zh) 高速用户设备的移动性管理
EP1763970B1 (fr) Traitement de donnees lors d'un transfert intrasite
EP3433943B1 (fr) Noeud de communication sans fil conçu pour émettre des faisceaux d'antenne de différents types
JP2000299659A (ja) 無線送信出力制御装置および無線通信システム
JP3866118B2 (ja) 空間分割多重アクセス装置、適応アレーアンテナ基地局、端末およびその制御方法
JP4436332B2 (ja) アダプティブアレイ基地局装置及びアダプティブアレイ基地局装置の制御方法
JP2013089983A (ja) 無線リレー局のアンテナ制御方法、無線リレー局
JP4436333B2 (ja) アダプティブアレイ基地局装置及びアダプティブアレイ基地局装置の制御方法
US20170279641A1 (en) Methods Used in Control Node and Serving Radio Node, and Associated Devices
JP2014090271A (ja) 通信システム、通信装置及びその制御方法、プログラム
JP3639168B2 (ja) 通信制御方法、移動通信システム、基地局及び移動局
JP2009290683A (ja) 無線送信装置および無線通信エリアの制御方法
US20110190025A1 (en) Device and method for controlling power of mobile communication terminal
GB2490883A (en) Assessing the robustness of a point-to-point communication path between two nodes in a wireless network
GB2479197A (en) Configuring a receiving antenna array for transmissions of a first type on the basis of transmissions of another type

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 7223/DELNP/2008

Country of ref document: IN

Ref document number: 12280670

Country of ref document: US

WWE Wipo information: entry into national phase

Ref document number: 200780006784.7

Country of ref document: CN

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 07714929

Country of ref document: EP

Kind code of ref document: A1